Keto Chicken Parmesan Casserole

This keto chicken parmesan casserole gives you the flavors of chicken parm without breading, frying, or pasta. Shredded cooked chicken gets folded into cream cheese seasoned with garlic and Italian herbs, loosened with marinara, then covered with more sauce, a thick layer of mozzarella, and Parmesan. It bakes until the sauce bubbles at the edges and the cheese melts into a golden top.

Because the chicken is already cooked, the oven only has to heat everything through, so dinner takes about 50 minutes from start to finish. Rotisserie chicken or leftover chicken breast works well. The ingredients are ones people often reach for on a low-carb or keto-style eating plan, and the ingredient notes below explain what to look for on the labels.

Why You’ll Love This Recipe

• Chicken parm flavor, no breading: Marinara, melted mozzarella, and nutty Parmesan are what make chicken parm taste like chicken parm. This casserole keeps all three and skips the flour, eggs, and breadcrumbs.
• Creamy, not dry: Cream cheese and a generous 3/4 cup of marinara coat every shred of chicken, so lean breast meat stays moist in the oven instead of turning stringy.
• Sauce on top where it belongs: A second layer of marinara goes over the filling before the cheese, so every scoop has the classic red-sauce-and-melted-cheese look.
• A smart use for cooked chicken: A pound of rotisserie, poached, or leftover chicken turns into a full dinner with one bowl and one baking dish.
• Low-carb ingredient choices: No-sugar-added marinara, full-fat cheeses, and no flour or breadcrumbs make this a good fit for many low-carb menus. You pick the specific products, so you stay in control of the label.

Ingredients

Prep: 15 minutes  |  Cook: 30 minutes  |  Rest: 5 minutes  |  Total: 50 minutes  |  Yield: 4 hearty servings (or 6 smaller servings with sides)

Equipment: 8×8-inch (2-quart) baking dish (metal or broiler-safe ceramic if you plan to broil), rimmed baking sheet, large mixing bowl, silicone spatula or sturdy spoon, measuring cups and spoons, instant-read thermometer

• 1 teaspoon olive oil or softened butter, for greasing the baking dish
• 4 ounces full-fat cream cheese, softened at room temperature for 30 minutes
• 2 garlic cloves, minced
• 1/2 teaspoon garlic powder
• 1 teaspoon dried Italian seasoning
• 1/4 teaspoon freshly ground black pepper
• 1/4 teaspoon red pepper flakes (optional)
• 1 pound cooked boneless, skinless chicken breast, shredded (about 3 cups)
• 1 1/2 cups no-sugar-added marinara sauce, divided
• 1 1/2 cups shredded whole-milk low-moisture mozzarella (6 ounces), divided
• 1/2 cup grated Parmesan cheese, divided
• 4 slices bacon, cooked crisp and crumbled (optional)
• 2 tablespoons chopped fresh flat-leaf parsley

Ingredient Notes

• Cooked chicken: Use about 1 pound of cooked chicken, which shreds into roughly 3 cups. Rotisserie chicken (skin removed), poached breasts, or leftover roast chicken all work, and dark meat is fine too. Shred it into bite-size pieces rather than long strands so the casserole scoops neatly. Cooked chicken keeps for 3 to 4 days in the refrigerator, so use it within that window.
• Marinara: You need 1 1/2 cups, a little more than half of a standard 24-ounce jar. For a low-carb or keto-style version, read the label and ingredient list: look for a marinara with no added sugar and compare the total carbohydrates per serving between brands. A no-sugar-added label does not mean the sauce has no carbohydrates, because tomatoes, onions, and carrots contain natural sugars. Choose a sauce that fits your own plan.
• Cream cheese: Full-fat block cream cheese gives the filling body and keeps the chicken moist. Soften it first so it blends smoothly with the seasonings. Cold cream cheese leaves white lumps in the filling. Reduced-fat versions are softer and can turn a little watery in the oven.
• Mozzarella: Shredded whole-milk low-moisture mozzarella melts smoothly and browns well. Fresh mozzarella balls release a lot of water as they bake, which makes the casserole soupy. Shredding your own from a block melts more smoothly than pre-shredded bags, which are tossed with anti-caking powder.
• Parmesan: Grated Parmesan adds the sharp, salty flavor that makes this taste like chicken parm. Half goes into the filling and half goes on top, where it browns.
• Garlic and seasonings: Fresh garlic and garlic powder do different jobs here. The minced cloves give sharp, fresh garlic flavor, while the powder spreads evenly through the cream cheese. Italian seasoning is a dried blend of herbs such as oregano, basil, and thyme. The red pepper flakes are optional and add only gentle heat at 1/4 teaspoon.
• No added salt: Marinara, Parmesan, mozzarella, rotisserie chicken, and bacon are all salty already, so the recipe adds no extra salt. If your chicken was cooked plain and unsalted, taste a bit of the filling before it goes into the dish and add a pinch of salt only if it tastes flat.
• Bacon (optional): Bacon isn’t part of classic chicken parmesan. It’s an optional addition for smoky flavor and a little crunch on top, and the casserole is just as good without it. Some bacon is cured with sugar, so check the label if you’re keeping close track of carbohydrates.

How to Make Keto Chicken Parmesan Casserole

1. Heat the oven: Set a rack in the center of the oven and heat it to 375°F. Grease an 8×8-inch (2-quart) baking dish with the olive oil or butter. If you plan to broil the top at the end, use a metal or broiler-safe ceramic dish rather than glass.
2. Season the cream cheese: In a large bowl, mash the softened cream cheese with the minced garlic, garlic powder, Italian seasoning, black pepper, and red pepper flakes (if using) until smooth and evenly speckled.
3. Mix the filling: Add the shredded chicken and stir until every piece is coated in the seasoned cream cheese. Fold in 3/4 cup of the marinara, 1/2 cup of the mozzarella, and 1/4 cup of the Parmesan. The mixture should look creamy and pale orange, with no dry clumps of chicken.
4. Layer the casserole: Spread the chicken mixture in the prepared dish and press it into an even layer. Spoon the remaining 3/4 cup marinara over the top and spread it all the way to the edges.
5. Add the cheese topping: Scatter the remaining 1 cup mozzarella over the sauce, then the remaining 1/4 cup Parmesan. Sprinkle the crumbled bacon on top, if using.
6. Bake: Place the baking dish on a rimmed sheet pan (it catches any sauce that bubbles over) and bake it uncovered until the sauce bubbles around the edges, the cheese is fully melted, and the middle of the casserole registers 165°F, 25 to 30 minutes.
7. Broil for color (optional): For browned spots on the cheese, turn on the broiler and broil for 1 to 2 minutes with the dish 6 to 8 inches from the heating element. Stay at the oven door the whole time, because cheese goes from golden to burnt quickly. Skip this step if your dish is glass.
8. Rest and serve: Let the casserole rest for 5 minutes so the filling settles and is easier to scoop. Sprinkle with the parsley and serve warm.

Tips for Success

• Soften the cream cheese first. Leave it on the counter for about 30 minutes, or microwave it in a bowl for 10 to 15 seconds. Soft cream cheese coats the chicken evenly. Cold cream cheese breaks into small lumps that never quite melt.
• Shred, don’t cube. Shredded chicken has rough edges that hold onto the cream cheese and sauce. Large cubes of breast meat tend to taste dry in the middle.
• Spread the top sauce to the edges. Marinara that reaches the sides of the dish protects the chicken underneath and bubbles up around the rim, which is your best visual sign that the casserole is hot.
• Check the center, not just the edges. The edges bubble well before the middle is hot. Because the chicken is already cooked, you’re reheating it, and leftovers should reach 165°F. Push an instant-read thermometer into the middle of the dish to check. If it reads lower, bake for another 5 minutes and check again. Starting with chicken straight from the refrigerator can take the full 30 minutes.
• Broil with care. Most glass baking dishes are not made for the direct heat of a broiler, so skip broiling unless your dish is metal or labeled broiler-safe. Keep the oven door within reach and pull the dish as soon as the cheese has golden spots.
• Let it rest. Five minutes out of the oven lets the cheese set slightly and the filling thicken, so each serving holds together on the plate.

Substitutions and Variations

• Chicken thighs: Shredded cooked thighs make an even juicier casserole. Use the same 1 pound.
• Classic without bacon: Leave the bacon off for a flavor that stays closer to traditional chicken parmesan. Nothing else changes.
• Crunchy low-carb topping: Toss 1/2 cup finely crushed plain pork rinds with 2 tablespoons of extra grated Parmesan and scatter it over the cheese before baking to get some of the crunch of breaded chicken parm.
• Add vegetables: Fold 1 cup of sauteed, well-drained mushrooms or wilted, squeezed-dry spinach into the filling. Squeeze out the moisture first, or the casserole will turn watery.
• Ricotta instead of cream cheese: Whole-milk ricotta gives a lighter, more lasagna-like filling. Use 1/2 cup and stir in an extra 2 tablespoons of Parmesan to help it hold together.
• Not keeping it low-carb? Any marinara works, and the casserole is also good spooned over spaghetti or with garlic bread on the side.

What to Serve with Chicken Parmesan Casserole

For a low-carb dinner, serve the casserole with a crisp green salad dressed with olive oil and red wine vinegar, roasted broccoli or green beans, sauteed zucchini noodles, or cauliflower rice to catch the extra sauce.

If low-carb isn’t a concern at your table, it’s great over spaghetti, with crusty bread, or next to a pan of garlic bread. For a bigger, party-style take on the same flavors, try our chicken parm stuffed garlic bread. And if you like cheesy bakes that start with cooked chicken, our chicken broccoli lasagna is another good way to use a rotisserie chicken. Looking for another low-carb casserole? Try this low-carb bacon cheeseburger casserole, or browse more easy dinner recipes.

Storage, Reheating, and Freezing

• Refrigerate: Cool leftovers, then cover the dish or move portions to airtight containers and refrigerate within 2 hours of baking. Eat within 3 to 4 days.
• Reheat: Warm individual portions in the microwave, covered, at 70 percent power, stirring once, until hot in the center (165°F). To reheat a larger amount, cover the dish with foil and warm it in a 350°F oven for about 20 minutes, until the center reaches 165°F. Bacon on top softens in the refrigerator, so you can crisp a little fresh bacon to sprinkle over reheated portions.
• Freeze: Freeze the cooled casserole, or individual portions, tightly wrapped, for up to 3 months. Thaw overnight in the refrigerator and reheat as above. The cream cheese filling may look slightly grainy after freezing, but the flavor holds up well.
• Make ahead: Assemble the casserole through step 5, cover it tightly, and refrigerate for up to 24 hours. Bake straight from the refrigerator, adding 5 to 10 minutes and checking that the center reaches 165°F. If you’re using bacon, add it just before baking so it stays crisp.

Keto Chicken Parmesan Casserole FAQ

Is this chicken parmesan casserole keto?

It’s built from ingredients that commonly fit keto and low-carb eating: chicken, cheese, cream cheese, and marinara, with no flour, breadcrumbs, or pasta. Whether a serving fits your plan depends on the exact products you buy, especially the marinara. Check its label for added sugar and total carbohydrates, and check the bacon too if you add it. If you track carbs closely, enter your own brands into your tracking app.

Does sugar-free marinara make the dish keto on its own?

No. A no-sugar-added marinara avoids added sweeteners, but tomato sauce still contains natural carbohydrates, and the amount varies from brand to brand. Treat the label as your guide and compare jars before you buy.

Can I use raw chicken?

This recipe is written for cooked chicken, and the bake time only heats it through. Raw chicken would release liquid and wouldn’t cook evenly under the cream cheese and sauce. Poach or bake the chicken first, let it cool slightly, then shred it.

How do I know when it's done?

The sauce should bubble around the edges, the cheese should be completely melted, and the center should read 165°F on an instant-read thermometer. With chicken straight from the refrigerator, that usually takes the full 25 to 30 minutes.

Why was my casserole watery?

The usual causes are fresh mozzarella, a very thin marinara, or vegetables added without squeezing out their moisture. Use low-moisture mozzarella and a thick jarred marinara, and let the casserole rest for 5 minutes before serving so the filling can settle.

Can I make it in a different size dish?

An 8×8-inch dish holds a layer a little over 1 inch deep, with plenty of headroom for the sauce and cheese to bubble. A 2-quart dish of another shape works as long as it holds the same volume. To feed a crowd in a 9×13-inch dish, double every ingredient and start checking the center after 30 minutes.

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